ABSTRACT
This is about two widely separated roofs with the same fundamental problem. The first was in Canada; the second in upstate New York.
We were called to investigate a roof on a manufacturing plant in Canada. The building was steel-framed with steel bar joists and deck supporting the roofing system. The roofing system consisted of several layers of insulation and a plate mechanically fastened to the deck and an EPDM membrane adhered to the plates. Leakage was reported everywhere inside the plant.
